A study of selected factors influencing the reproductive performance of the common tern (Sterna hirundo) at Port Colborne, Ontario in 1973 and 1974
Several study areas were investigated at two Port Colborne terneries during the summers of 1973 and 1974 in an attempt to determine the influence of clutch size, time of clutch initiation, position in the colony, proximity to Ring-billed Gulls, vegetation and nesting substrate on the reproductive pe...
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2009
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ftbrockuniv:oai:dr.library.brocku.ca:10464/2740 2023-07-16T03:58:01+02:00 A study of selected factors influencing the reproductive performance of the common tern (Sterna hirundo) at Port Colborne, Ontario in 1973 and 1974 Hunter, Rodger Allan. Department of Biological Sciences 2009-10-02T13:19:52Z http://hdl.handle.net/10464/2740 eng eng Brock University http://hdl.handle.net/10464/2740 Common tern Terns Water birds--Ontario--Port Colborne Electronic Thesis or Dissertation 2009 ftbrockuniv 2023-06-27T22:07:55Z Several study areas were investigated at two Port Colborne terneries during the summers of 1973 and 1974 in an attempt to determine the influence of clutch size, time of clutch initiation, position in the colony, proximity to Ring-billed Gulls, vegetation and nesting substrate on the reproductive performance of the Common Tern. Hatching success and reproductive success (the number of chicks fledged per egg laid) were generally higher for 3-egg than 2-egg clutches but fledging (the number of chicks fledged per egg hatched) success was usually independant of clutch size. Hatching, fledging and reproductive success declined as a function of time of clutch initiation. Mean clutch sizes also generally declined as a function of time. Nests located in the center of the colony exhibited higher fledging success than those on the periphery. Rock-based clutches had a lower hatching success than clutches initiated on sand or dried vegetation. Reproductive performance did not appear to be related to proximity to Ring-billed Gulls or vegetation within the study area. Thesis Common tern Sterna hirundo Brock University Digital Repository |
institution |
Open Polar |
collection |
Brock University Digital Repository |
op_collection_id |
ftbrockuniv |
language |
English |
topic |
Common tern Terns Water birds--Ontario--Port Colborne |
spellingShingle |
Common tern Terns Water birds--Ontario--Port Colborne Hunter, Rodger Allan. A study of selected factors influencing the reproductive performance of the common tern (Sterna hirundo) at Port Colborne, Ontario in 1973 and 1974 |
topic_facet |
Common tern Terns Water birds--Ontario--Port Colborne |
description |
Several study areas were investigated at two Port Colborne terneries during the summers of 1973 and 1974 in an attempt to determine the influence of clutch size, time of clutch initiation, position in the colony, proximity to Ring-billed Gulls, vegetation and nesting substrate on the reproductive performance of the Common Tern. Hatching success and reproductive success (the number of chicks fledged per egg laid) were generally higher for 3-egg than 2-egg clutches but fledging (the number of chicks fledged per egg hatched) success was usually independant of clutch size. Hatching, fledging and reproductive success declined as a function of time of clutch initiation. Mean clutch sizes also generally declined as a function of time. Nests located in the center of the colony exhibited higher fledging success than those on the periphery. Rock-based clutches had a lower hatching success than clutches initiated on sand or dried vegetation. Reproductive performance did not appear to be related to proximity to Ring-billed Gulls or vegetation within the study area. |
author2 |
Department of Biological Sciences |
format |
Thesis |
author |
Hunter, Rodger Allan. |
author_facet |
Hunter, Rodger Allan. |
author_sort |
Hunter, Rodger Allan. |
title |
A study of selected factors influencing the reproductive performance of the common tern (Sterna hirundo) at Port Colborne, Ontario in 1973 and 1974 |
title_short |
A study of selected factors influencing the reproductive performance of the common tern (Sterna hirundo) at Port Colborne, Ontario in 1973 and 1974 |
title_full |
A study of selected factors influencing the reproductive performance of the common tern (Sterna hirundo) at Port Colborne, Ontario in 1973 and 1974 |
title_fullStr |
A study of selected factors influencing the reproductive performance of the common tern (Sterna hirundo) at Port Colborne, Ontario in 1973 and 1974 |
title_full_unstemmed |
A study of selected factors influencing the reproductive performance of the common tern (Sterna hirundo) at Port Colborne, Ontario in 1973 and 1974 |
title_sort |
study of selected factors influencing the reproductive performance of the common tern (sterna hirundo) at port colborne, ontario in 1973 and 1974 |
publisher |
Brock University |
publishDate |
2009 |
url |
http://hdl.handle.net/10464/2740 |
genre |
Common tern Sterna hirundo |
genre_facet |
Common tern Sterna hirundo |
op_relation |
http://hdl.handle.net/10464/2740 |
_version_ |
1771544964316004352 |